dt-bindings: arm: rockchip: Correct vendor for Hardkernel ODROID-M1

dt-bindings: arm: rockchip: Correct vendor for Hardkernel ODROID-M1

The vendor prefix for Hardkernel ODROID-M1 is incorrectly listed as
rockchip. Use the proper hardkernel vendor prefix for this board, while
at it also drop the redundant soc prefix.

Fixes: 19cc53eb2ce6 ("dt-bindings: rockchip: Add Hardkernel ODROID-M1 board")
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240827211825.1419820-2-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>